Chris wrote:
Would Polyester resin do? Polyester is UV resistant, is it?

Thanks!

It would propably do, but why use something that isn't even close to
being as good as epoxy? It certainly won't be easier to use, all things
equal.

The reason I care about the uv is that I want the result to last as
long as at all possible, ut most things degrade with uv - look at
rubber left in the sun, for one. I would certainly use epoxy instead
polyester.
Without a doubt.

the effort to get a good result is about the same, but polyester isn't
as rigid, as waterproof (epoxy is a sort of plastics), or as strong as
epoxy, although it does degrade less with UV. However, it's not just
UV-protection you want. You want all of the other things as well.